Elasticsearch 阮一峰教程 实验

初学Elasticsearch，按照阮一峰老师的教程进行实验。

实验环境:

linux-16.04

java-oracle-jdk8

Elasticsearch-6.3.0

 

在中文分词设置阶段：

安装IK中文分词插件：

./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.3.0/elasticsearch-analysis-ik-6.3.0.zip

出现：

Exception in thread "main" java.net.NoRouteToHostException: No route to host (Host unreachable)

这样的一个timeout错误，原因为是在公司proxy下运行，且java程序 install 时先下载文件，所以无法访问。

解决方案：

本地安装。

./bin/elasticsearch-plugin install file:~/Downloads/elasticsearch-analysis-ik-6.3.0.zip

 

 

新建带分词的index时运行： 

$ curl -X PUT 'localhost:9200/accounts' -d '
{
  "mappings": {
    "person": {
      "properties": {
        "user": {
          "type": "text",
          "analyzer": "ik_max_word",
          "search_analyzer": "ik_max_word"
        },
        "title": {
          "type": "text",
          "analyzer": "ik_max_word",
          "search_analyzer": "ik_max_word"
        },
        "desc": {
          "type": "text",
          "analyzer": "ik_max_word",
          "search_analyzer": "ik_max_word"
        }
      }
    }
  }
}'

报错： 

{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported

原因为ElasticSearch 6.0版本之后有严格的格式检验

可以在建立index时，加入：-H 'Content-Type: application/json'

如

$ curl -X PUT 'localhost:9200/accounts' -H 'Content-Type: application/json' -d '
{
  "mappings": {
    "person": {
      "properties": {
        "user": {
          "type": "text",
          "analyzer": "ik_max_word",
          "search_analyzer": "ik_max_word"
        },
        "title": {
          "type": "text",
          "analyzer": "ik_max_word",
          "search_analyzer": "ik_max_word"
        },
        "desc": {
          "type": "text",
          "analyzer": "ik_max_word",
          "search_analyzer": "ik_max_word"
        }
      }
    }
  }
}'

类似的，插入记录

$ curl -X PUT 'localhost:9200/accounts/person/1' -d '
{
  "user": "张三",
  "title": "工程师",
  "desc": "数据库管理"
}' 

转为

$ curl -X PUT 'localhost:9200/accounts/person/1' -H 'Content-Type: application/json' -d '
{
  "user": "张三",
  "title": "工程师",
  "desc": "数据库管理"
}'